fix #2592 (for real this time)

fix #2592

prioritize hw instead of straight up removing the choice to create a sw
object. for example, allow to use either of the swapped UART0 pins when
we already use the main ones

c/p PSTR attribute from Core files
dostring declaration with a macro instead of a scary looking boilerplate

saves varying amount of code space, mostly deals with our key and cmd strings

- setup uart at boot instead of delaying until some module needs it
  removes global `SERIAL_BAUDRATE` and `DEBUG_PORT` in favour or
  globally accessible numbered port configurations with `MODULE_NAME_PORT`
- automagically enable uart support for sensors that need it
- allow every sensor to configure uart0 (normal and swapped), uart1
  and an optional software-serial mode support with an extra build flag
  remove individual includes across the sensors
- settings queries and runtime port configuration (prefixed with uart)
- update dependencies header to cross-reference used ports at build time
- update deprecations header with serial baudrate notice